Synthesis of Controllable Cu Shells on Au Nanoparticles with Electrodeposition: A Systematic in Situ Single Particle Study.

Autor:	Elabbadi M; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom CB3 0FS.; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, United Kingdom CB2 3EQ., Boukouvala C; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom CB3 0FS.; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, United Kingdom CB2 3EQ., Hopper ER; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom CB3 0FS.; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, United Kingdom CB2 3EQ.; Department of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, United Kingdom CB3 0AS., Asselin J; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom CB3 0FS.; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, United Kingdom CB2 3EQ., Ringe E; Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom CB3 0FS.; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, United Kingdom CB2 3EQ.
Jazyk:	angličtina
Zdroj:	The journal of physical chemistry. C, Nanomaterials and interfaces [J Phys Chem C Nanomater Interfaces] 2023 Mar 01; Vol. 127 (10), pp. 5044-5053. Date of Electronic Publication: 2023 Mar 01 (Print Publication: 2023).
DOI:	10.1021/acs.jpcc.2c08910
Abstrakt:	Bimetallic Cu on Au nanoparticles with controllable morphology and optical properties were obtained via electrochemical synthesis. In particular, multilobed structures with good homogeneity were achieved through the optimization of experimental parameters such as deposition current, charge transfer, and metal ion concentration. A hyperspectral dark field scattering setup was used to characterize the electrodeposition on a single particle level, with changes in localized surface plasmon resonance frequency correlated with deposition charge transfer and amount of Cu deposited as determined by electron microscopy. This demonstrated the ability to tune morphology and spectra through electrochemical parameters alone. Time-resolved in situ measurements of single particle spectra were obtained, giving an insight into the kinetics of the deposition process. Nucleation of multiple cubes of Cu initially occurs preferentially on the tips of Au nanoparticles, before growing and coalescing to form a multilobed, lumpy shell. Modifying the surface of Au nanoparticles by plasma treatment resulted in thicker and more uniform Cu shells. Competing Interests: The authors declare no competing financial interest. (© 2023 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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